Cognivue’s test battery consists of 10, one-minute, separately scored sub-tests. The sub-tests measure tracking movement, vision, and the perception and memory of letters, words, shapes, and motion. The cognitive impairment test battery consists of three stages, noted in the Cognivue testing algorithm below.
Stage 1: Visuo-Motor Testing
Stage 1 consists of two sub-tests of basic motor and visual abilities. These tests verify that the patient can move the CogniWheel™ and see the visual stimuli.
The rate and manner of stimulus presentation in the remaining sub-tests are modulated by the scores on Stage 1 testing. Stage 1 scores are not included in the final cognitive impairment assessment test scoring.
Stage 2: Perceptual Processing
Stage 2 consists of four sub-tests of higher visual processing abilities. The four perceptual test domains include letter and word recognition and shape and motion discrimination.
The Letter and Word Recognition sub-tests quantify the patient’s ability to identify real English letters and three-letter words.
The Shape and Motion Discrimination sub-tests quantify the patient’s ability to discriminate one regular shape from others, and quantify the patient’s ability to identify a circle of dots moving in a different pattern from those in other dot circles.
Stage 3: Memory Processing
Stage 3 consists of four sub-tests of memory for specialized sets of visual stimuli. These tests can be interpreted in the context of the corresponding perceptual processing tests. Their relationships depend on the partial separability of domain perception and mnemonic function.
The Letter and Word Memory sub-tests examine the patient’s ability to recall which English letter and word was presented as a pre-cue—and then select that letter or word from an array of alternative letters and words.
Similarly, the Shape and Motion Memory sub-tests measure the patient’s ability to recall which common shape and pattern of motion was presented as a pre-cue—and then select that shape or motion from the annular array of alternative shapes and directions.